fix: ensure non-standard FVP UART port schemes are respected

Change-Id: I75acd7c1b1cfc7a1e6c4fd22494a351d4ae7f65b
Signed-off-by: Chris Kay <chris.kay@arm.com>
(cherry picked from commit 24d039f93ce6d4373e2a8a23c511ebd872911e5a)
3 files changed